import java.util.Locale;
import java.util.Scanner;

public class Test2 {
    public static void main(String[] args) {
        System.out.println("输入字符串:");
        Scanner sc = new Scanner(System.in);
        String line = sc.nextLine();
        String line2 = line.toLowerCase(Locale.ROOT);
        System.out.println(line2);
    }
}
